Cohen, R. (1949). The economics of agriculture. Univ. Press.
Lua i Stíl Chicago (17ú heag.)Cohen, R. The Economics of Agriculture. Cambridge: Univ. Press, 1949.
Lua MLA (9ú heag.)Cohen, R. The Economics of Agriculture. Univ. Press, 1949.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.